Bobbin holder



Mrch 25, 1930. P. J. THOMAS I I 21,751,566?.

` l BoBBIN HOLDER Filed Dec. 17, 192s INVEN TOR.

ATTORNS.

Patented Mar. 25, 1930 UNITED ,STATES PMYENIv oFFic-E PACIPIC .I.THOMAS, .oP PHILADELPHIA, PENNSYLVANIA, AssIGNoR To FLETCHER woRKs,INCORPORATED, oP PHILADELPHIA, PENNSYLVANIA, A CORPORATION or pPENNSYLVANIA BOBBIN HOLDER Application mea'neember 17, 192s. serial No.326,488.'

This invention relates'to an improvement in bobbin holders for twistingor spinning machines. In such machines, as now constructed, the yarn isdrawn from spools 5 mounted on spindles at the lower part of themachine, passing up over ,porcelain guides carried by a reci rocatingtraverse bar' and on to bobbins at t e top ofthe machine.

y These bobbins areI rotated by friction rolls contacting with the yarnon the bobbins, so

that the same linear or surface speed is maintained throughout theoperation regardless of the size ofthe bobbin to insure a uniform twistper inch. If a thread breaks, however, in such machines, the bobbin willcontinue to rotate, driven by the friction roll, until lifted off byhand, and if not lifted off at once this continued rolling or rotatingwill untwist the yarn thereon for several yards. Further o more, undersuch conditions' the .yarn at the surface may become somewhat` abradedresulting in second grade stock.

The invention of the present applicationovercomes this action, meansbeing. provided whereby when a thread breaks the bobbin is liftedautomatically and bodily away from the friction roll, the mechanismemployed being of such a character as to act as a brake Ito mechanicallybring thebobbin to rest.

w10 Not only does this apparatus effect a savthe expense of an operatorto watch for break'ages. As a matter of fact such operators are notentirely satisfactory inasmuch as the yarn may have broken and the silkbe untwisted somewhat before the break is noticed. l y Q With thepresent construction, therefore, I provide automatically functioningapparatus'so arranged that-when a yarn breaks thebobbin will be liftedclear of its driving roll, thereby preventing rubbing and abrasion4 lofthe yarn, the ,bobbin alsobeing brought to rest automatically to preventuntwisting ofthe' yarn.

In the drawings accompanymg this appliy cation, Fig. l is a sectiontransverse of the friction roll, the bobbin andthe traverse rail of myinvention;

Fig. 2 is a part plan and part sectional view of a portionof a machineinwhich my invention is incorporated; Fig. 3 is an elevational view, takenfrom the front of the apparatus, i. e., looking from left to right inFig. 1

'-Fig. 4 is a view somewhat similar to Fig. 1 but showing various partsof the apparatus vin the positions they assume whena thread twistedrests on the periphery of the friction roller, thereby to provide adrive between the friction driving rollers and bobbins. mechanism so fardescribed is standard construction.

ynach bobbin ifs mounted in a, frame desig nated 3 rigidly secured to arail 4 extending lengthwise ofthe machine.

' I have mentioned above that in existing machines thethread beingtwisted or spun isv The.

taken from spools mounted on spindles disl posed below the bobbins, andthat in passingV to the bobbins.- the thread is led through a porcelainguide. Such a guide is shown at 5 in Fig. 1. Heretofore the dicultyexperienced With these machines has been due` to breakingof the thread.The thread is designated 6 and in machines asy heretofore constructedwhen a threadk breaks the bobbin or I rather.' the Amaterial thereon.remaining in contact with the friction roller will lcontinue to rotatewith the likelihood of abrasion of the surface of the silk or othervmaterial on thebobbin and untwisting of this material. The result is a'second grade product. In view of all this it becomes necessary t lem- Yploy attendants to Watch for broken threads, -Which is only partiallysatisfactory as the designated 8, this rail being reciprocated throughsuitable mechanism, standard equipment 1n existing machines, overrollers 9, to

' properly lead or guide the thread to the-bobbin.

In the present arrangement .the frame 3 above referred to providesbearings 1() and 11 for the bobbins. This frame is provided with acradle 12 pivoted thereto. The ends 'or end members of this cradlewhichI shall designate 13, lie beneath the end-members 14 of-each bobbin. Thepivot for each cradle is designated 15 and is provided with a coilspring 12 so arranged that this spring will tend vto raise the cradlefrom the position shown in Figfl to that shown in Fig. 4.

Means, however, in the form of a latch are provided for holding thecradle -in depressed position, that is to say in the position shown inFig.' 1, at which time the bobbin 2v lies in its normal position in itsbearing'in the frame 3 with the cradle end members 13 out of contactwith the bobbin ends but beneathrthe' To trip the latch mechanism so astoper-L mit the cradle'automatically to lift thereby to engage and raisethe bobbin, I provide the spring latch 16 with a tripping ngei' 22.-Depression of this'finger will move the member 18 fout of the path ofthe projection 19 on the'cradle and the cradle will be raisedautomatically by the springd2 to raisethebobbfn as Will be presentlydescribed in connection with the breaking of the thread 6.

I have already mentioned that the traverse Y bar 8 carries a porcelainguide 5 for the thread. It also carries a guide 23 whichV may be ofporcelain or any other suitable smooth material which will not damagethe surface ber being pivoted'at 24 to the' mount which j carries theguide 5 and all of Vwhich is secured to the traverse rail 8..' Thisguide 23, or possibly more accurately, this tripper carries an extensionor arm 25 adapted when a thread breaks to engage the trip 22 of thelatch mechanism to depressuand release the same, that is to move theprojection 18 of the spring latch out beyond the projection 19 on thecradle to permit the cradle to lift automatically from the position ofFig. 1 to the position shown in Fig. 4, carrying With it the bobbin 2.Inasmuch as the lcradle .when being lifted engages the end-members 14 ofthe bobbin, the cradle will act as a brake on the bobbin, so that notonly is the bobbin lifted to bring the material thereon out ofengagement -with the driving friction roller 1, butA in effect a brakeis applied to bring the b'obbin to rest. -Consequently the material onthe bobbin cannot be abraded by thefriction roller and-the silk or othermaterial on the bobbin cannot be untwisted due to continued rotation ofthe bobbin out of engagement with the roller 1 with'the thread 6 broken.

',In a machine where several bobbins arranged as described are provided,as will be the commercial application of my invention,

it may be desirable to provide for holdingv the members 25 out ofengagement with the projections 22 onV the spring latches 16 manually,when starting the machine inasmuch as at that time there is no tensionon the Vthreads 6.

I have provided, therefore, a lug 26 at each..

bobbin and operable by a rod or wire 28 from 'one end of the machine,these lugs being of such a characterV as to b e-movable manually whendesired into the path of theflugs 25. This will insure in starting ofthe machine that the members 25 will be maintained out of engagementwith the trip fingers 22, so vthat the, cradles will all be in-theirdepressed and latched position with the bobbins pro erly located intheir respective bearings. f course after the machine has begun tooperateso that there is tension on the threads 6 then the lugs 26 lwillbe withdrawn and the members 25 will be held by the tension in therespective .threads out of engagement with the trip ngers 22 except whena thread is broken, whereupon the guide 23 will drop down and bring themember 25 into position to engage the trip member 22 forcing the samedownwardly, releasing the Vcradle at that particular bobbinand allowingthe same to move upwardly automatically under the action of the spring12 to raise the bobbin and the material thereon.

I have provided, therefore, for a vstop motion trip mounted o n thetraverse bar, 'controlled by the tension in the thread being -iistwisted or spun and -operable automatically i lupon the breaking of athread in the ma- 05 of thethrad beingtwisted orspun, thismexnchine; forthe liftingvof bobbin, at a t broken thread, `free of the drivingroller;

and for a brake action'on the bobbin after the same is raised. f

It is to be understood that changes may be made in the constructionherein illustrated and described within the purview of my invention.

What I claim isz- 1. In a thread twisting or spinning machine thecombination of a bobbin, a frame providing bearings therefor and inwhich the bobbin is rotated, a pivoted cradle mounted beneath thebobbin, a spring for moving the cradle about its pivot to raise thebobbin out of its bearings and means controlled by the thread being ledto the bobbin to release the cradle under predetermined conditions topermit the saine to move to its raised tion.

2. In a thread twisting or spinning machine a frame, a bobbin mounted inbearings therein, a pivoted cradle extending beneath the bobbin, aspring for moving the cradle posiinto engagement with the bobbin and toraise out of its bearings.

the bobbin out of its bearings in said frame,

and latch mechanism controlled by the thread being twisted or 'spun fornormally holding they cradle-out of bobbin-engaging position, said meansbeing operable upon the breakage of the thread to release said latchmechanism whereby the bobbin is raised out of its bearings.

3. In a twisting or spinning machine the combination of -a frame, abobbin mounted in bearings thereon, a pivoted cradle beneath the bobbinand normally out of contact therewith, a traverse bar extendinglongitudinally of the bobbin and lstop motion tripping mechanism mountedon said traverse bar and cooperating with said cradle to release thesame under predetermined conditions, whereby the cradle pivots towardthe bobbin into engagement with the same to move the bobbin 4. In atwisting or spinning machine a bobbin frame, a bobbin mounted therein,`ra

ffriction roller beneath the bobbin adapted to engage the material onthe bobbin to drive the same, a cradle pivoted on said frame andextending beneath the bobbin, a spring for moving the cradle intoengagement with the bobbin and to thereby raise the thread on the bobbinfree nf the periphery of the friction roller, a latch for holding thelcradle in depressed position and thread-controlled trip mechanism forreleasing said latch under predetermined conditions to permit thevcradle to move the bobbin away from the friction roller.

5..In a thread twisting or spinning machine a bobbin frame providingbobbin bearings, a cradle pivoted to said frame and underlying a bobbinwhen mounted in said bearings, meansv for actuating the cradle towardand into contact with the bobbin under predetermined conditions,latchmechani'sm normally preventing such movement of the cradle andthread-controlled trip mechanism for releasing said latch.

6. In a thread twisting or spinning machine a'bobbin frame, a cradlepivoted there' to, a spring for raising the cradle to lift a bobbinmounted in said frame, latch mechanism for retaining the cradle indepressed tioned adjacent the bobbin and adapted to engage the materialon the bobbin to drive the bobbin, a pivoted cradle extending-beneaththe bobbin, a spring for moving said cradle about its ivot toward thebobbin, latch mechanism or holding the cradle normally in depressedposition, and thread-controlled trip mechanism for releasing said latch,said cradle on its upward movement raising the bobbin out of drivingengagement with the friction roller and at the same time applying abraking action to the bobbin.

8. In a thread twisting or spinning machine the combination of a bobbinframe, a bobbin mounted therein, a cradle pivoted to said frame andextending'beneath the bobbin, a friction roller, the periphery of whichis adapted to engage thread 'upon the bobbin to rotate the bobbin, areciprocating traverse bar extending lengthwise of the bobbin, vathread-controlled pivoted member carried by said traverse bar, latchmechanism for holding the cradle normally out of bobbinengagingposition, said thread-controlled member being provided with an extensionfor tripping said latch mechanism upon`- the breakage of the threadbeing twisted or spun to unlatch the cradle to permit the same to raisethe bobbin from driving engagement *1 with the friction roller.

taining the cradle in depressed position and operable upon breakage ofthe Ithread beingl twisted or spun to release said latch.

10. In a twisting or spinning machine the combination of a plurality offixed bobbin frames, a pivoted cradle for each frame, a

spring for each cradle adapted to .actuate the cradles into engagementwith the bobbins to raise the same out of said frames upon threadbreakage, latching mechanism for holding said cradles normally indepressed position,

thread-controlled means for releasing said Y latch mechanism, andmanually operable` means for holding said latch releasing or trippingmechanism out of operative position in the initial starting ofthemachine.

5 11. In a threadtwisting or spinning ma-` chine a bobbin, a frameproviding bearings for the bobbin, and a'pivoted cradle extendingbeneath the bobbin and normally-out o1 Contact therewith andautomatically movable A 10 about its pivot to engage the bobbin andraise the samel out ofits bearings upon the breakage of a thread beingled to the bobbin.

This 'specification signed this 14th day of December, 1928.

I l15 PACIFIC J. THOMAS.

